how does one use blue mage?

[Canadane]

hello I have been off the game for some time (I missed a lot)
seance coming back I have adapted to most of the changes but blue mage confuses me.
mostly because I do not know how old some of the stuff i'm reading is or what has changed.

that said is it true you can learn blue magic while in other jobs or was that a lie?
if not then how does one learn blue magic when its use is so limited ?
(can not use duty finder)

while blue mage is a fun consent is it worth the grind when it use is so limited?

if square has lighted its restrictions seance it came out I would like to know. is it possible that it will not be a limited job one day?

There is a wall of text above me that probably explains this but I know what formatting is good for.

No you cannot learn blue magic while not on the job, I'm not sure who told you this but they are lying.
You can queue for dungeons using PF, you just cannot take randoms with you. As such you'll either need a premade party of 4, or you undersize it so you aren't attempting to pull random players in.

The grind isn't actually all that much of a grind. Actual job levels can be done in an hour or two, and the skills are all combat earned so it's a little more exciting than some other classes.

It will probably never be a not-limited job, so to speak. There's been no lightening on restrictions, and probably never will be. But honestly other than the level cap, this only limits you from doing a small amount of content. Deep Dungeons, and PvP. I can't think of anything else BLU can't do. In fact, doing some old endgame raids is really fun and refreshing as BLU, it gets you the morbol mount if you can complete them all so there's some fun and interesting endgame fights ready for you with some nice titles and mounts as rewards.